Brake shoe



Nov. 1, 1927. 1,647,218

A. w. FIELD BRAKE SHOE Filed March 25, 1925 Patented Nov. 1, 1927.

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' 5 BRAKE snon. 7

Application filed-March 25, 1925. Serial no. 1 e,2 3o.-

My invention relates to brake shoes for vehicles, wheels and the main object of the invention is to provide a shoe of simple 0on struction for v firmly holding the wooden brake blocks and to construct the shoe in such a manner, that old worn out blocks may be readily exchanged for new ones, without detaching the shoe from the brake levers.

For this purpose the shoe is preferably made of cast-material and curved c0ncentrically with the wheel for which it is intended. The shoe is further recessed to receive a number of wooden blocks which may he slipped in place in the shoe andretained therein without danger of dislodging.

In the accompanying drawings one embodiment of the invention is illustrated, and

Fig. 1 shows a fragmentary side elevation of a wagon provided with a brake forming the subject matter of the present invention;

Fig. 2 is a section along line 22 of Fig. 1, and

Fig. 31s a perspective view of the brake shoe seen from the under side.

In the drawing reference numeral 10 represents a wheel of a wagon or other vehicle and reference numeral 11 indicates the brake shoe.

The brake shoe is preferably made of cast iron and has a curved bottom portion 12, the curvature of which is made with aradius somewhat greater than the radius of the wheel rim 10. The shoe has two side walls 13 standing perpendicularly to the bottom 12 or in other words running in radial direction as regards the wheel axis. The sides 13 terminate with'inwardly bent flanges 14 of sufficient width to hold the brake blocks 15 in position in the shoe; 1

The end of the shoe, which is placed lowermost when in position, has an end flange 15 of approximately the same width as the curved flanges 14 on the side walls 13. This end flange continues at right angles to the side walls 13 as at 16 and runs into the flanges 14 as best seen in Fig. 3 In this manner an abutment for the lowermost brake block 15 is formed by the end flange 15 and its continuation 16, so that the lowermost block cannot fall out from the shoe.

At the upper end of the shoe the curved Y flanges 14 terminate as at 17, the distance from the upper end of the shoe being substantially the width of one of the brake blocks 15 in order to permitthe insertion of the blocks from this end. A transverse flange 18 connecting the end walls 13 has approximately the same depth as the other transverse flange 15. It is now evident that the blocks 15, which should not be thicker than the depth of the space formed-between the curved flanges l4 and the bottom 12, may be inserted one by one in the upper end of the shoe and passed along the curved flanges 14 toward the lower end of the shoe. The

last inserted block would have no support on its underside and for this reason an aperture 19 is provided in each of the side walls 13, through which a'nail or other fastener may be driven to engage the last block 15, in

this manner'holding the same and the other blocks in position.

About midway between the two ends of the shoe is'preferably provided a piece of angle iron 20firmly secured on the back of the bottom 12 and provided with apertures 21 for attaching the same to the arm 22 of the brake lever of any suitable construction. At times it might be advisable to secure the lever 22 directly on the back of the bottom 12, for which purpose other apertures 23 are furnished inthe bottom 12 of the shoe. It-

is evident that the apertures 21 in the angle iron 20, as well as the apertures 23 inthe shoe itself, may be jointly used for securing the same on the brake lever 22.

A practical size for these shoes for ordi nary wagon wheels is about 18 inches in length, 5 inches in width transversely between the side walls of the channel, 2 inches in depth of the side walls, of an inch in width and of an inch in thickness of the annular flanges 14. This will take wooden blocks approximately 2 inches thick, 4 inches wide and 5; inches long and would suit a.

wheel rim 4 inches wide or less and it is evident that without much trouble, theblocks can be taken out from the channel and replaced by new ones.

. For larger as well as for smaller wheels different dimensions will be used. The shoe itself may be of cast or pressed steel or malleable cast iron.

The blocks are preferably soft wood as it gives a better grip on the iron rim of the wheel but some fibre composition might at times be preferable to the wood.

This brake construction can be utilized for wheels on any vehicle but is not surpassed for heavy wagons.

Having thus described the invention, what I is claimed as new is:

in a recessed abutment, the side walls at their forward ends being connected by a transverse flange, the upper terminals of the terminal flanges stopping at a point remote from the ends of the side walls to provide an entrance for the successive nsertlon or removal of blocks, the wheel engaging sure faces thereof being exposed between the terminal'flanges to permit a Wheel [rim to engage therewith. y

In testimony whereofI affix my signature.

ALEXANDER W. FIELD. a 3. 

